Mast, Samuel Ottmar, 1871- · New York : J. Wiley & Sons · leaf 204
FlO. 27. The lines i, i, etc., in A, B, C, D, represent courses taken by fourdifferent blow-fly larvae in light of 78 ca. m. intensity, fi, direction of horizontalrays from single Nernst glower. Orientation is not as accurate as one ifould ex-pect if light acts constantly as an orienting stimulus…
Light · Phototropism
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